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You haven't mentioned your age. An age-related osteoarthritis
causing cervical spondylosis
can cause the above symptoms. It could also be Parkinsonism which is known to cause tremors of hands, weakness, swallowing. Since you have vertigo (sensation of falling) with headache I suggest you visit the Neurologist
and ask if MRI Brain is required. It is a better diagnostic modality for brain problems. Are you a Hypertensive. This can be a feature of uncontrolled hypertension
. Get your blood pressure examined and blood tests done for Vitamin B12 also.